#!/bin/sh -e

if [ $# -lt 1 ]; then

    echo "What?"

    exit 1

fi

repo="https://svn.apache.org/repos/asf/httpd/httpd/trunk"

repo="https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x"

ver=2.4.25

prefix="httpd-${ver}"

suffix="r$1${2:++}"

fn="${prefix}-${suffix}.patch"

vcurl="http://svn.apache.org/viewvc?view=revision&revision="

if test -f ${fn}; then

    mv -v -f ${fn} ${fn}\~

    echo "# $0 $*" > ${fn}

    sed '1{/#.*pullrev/d;};/^--- /,$d' < ${fn}\~ >> ${fn}

else

    echo "# $0 $*" > ${fn}

fi

new=0

for r in $*; do

   if ! grep -q "${vcurl}${r}" ${fn}; then

       echo "${vcurl}${r}"

       new=1

   fi

done >> ${fn}

[ $new -eq 0 ] || echo >> ${fn}

prev=/dev/null

for r in $*; do

    echo "+ fetching ${r}"

    this=`mktemp /tmp/pullrevXXXXXX`

    svn diff -c ${r} ${repo} | filterdiff --remove-timestamps -x 'CHANGES' -x 'next-number' -x 'STATUS' \

        --addprefix="${prefix}/" > ${this}

    next=`mktemp /tmp/pullrevXXXXXX`

    combinediff --quiet ${prev} ${this} > ${next}

    rm -f "${this}"

    [ "${prev}" = "/dev/null" ] || rm -f "${prev}"

    prev=${next}

done

cat ${prev} >> ${fn}

vi "${fn}"

echo "+ git add ${fn}" 

git add "${fn}"

echo "+ spec template:"

echo "PatchN: ${fn}"

echo "%patchN -p1 -b .${suffix}"